. >>> with new information about the man the feds say sent letters that were poisoned to president obama and a u.s. senator from mississippi. his name is paul curtis. he has been known to local law enforcement, for what we don't know. and he would sometimes work as an elvis impersonator. the letters that contained a white powder said, quote, no one wanted to listen to me before. what does that mean? so far, nobody is saying. preliminary tests say the white powder is the poison radio ricin. >>> the president didn't mince words today. he called it a shameful day for washington. >> there were no coherent arguments as to why we wouldn't do this. it came down to politics. the worry that that vocal minority of gun owners would come after them in future elections and so they caved to the pressure. and they started looking for an excuse, any excuse for vote no. >> the measure had 54 yes votes but it needed 60 to beat a republican filibuster. five democrats also opposed the plan. both california senators voted in favor. >>> coming up, we'll continue our coverage of the latest on that huge explosi